How To Troubleshoot Lights Not Working. Read on to learn how to test and identify common causes associated with fluorescent lights that do not illuminate. If your pool lights are flickering or not working we have tips to help you troubleshoot the issue.

Fluorescent lights are filled with neon gas that once electrical current is added illuminates. To check if this is the problem connect the switch to a working ground using a jumper wire. This tip applies to fluorescent lights especially the traditional tubes that depend on large ballasts or devices that moderate the electrical current that runs through the gas in the fluorescent bulb.
These are the wires that lead to the tail lights located inside the lid of the trunk.
I have an outdoor light that is not working right. Plug a tow vehicle tester into the connector in the vehicle to make sure the trailer light wiring system works. If the bulbs are not the problem disconnect the trailers wiring system from the tow vehicle. To check if this is the problem connect the switch to a working ground using a jumper wire.

